--- a/tests/test-evolve-split.t	Fri Jun 14 18:44:43 2019 -0700
+++ b/tests/test-evolve-split.t	Fri Jul 19 17:25:29 2019 +0800
@@ -42,7 +42,7 @@
   $ printf "pp" > pp;
   $ hg add pp
   $ hg commit -m "_pp"
-  $ hg prune --succ "desc(_oo) + desc(_pp)" -r "desc('oo+pp')" --split
+  $ hg prune --successor "desc(_oo) + desc(_pp)" -r "desc('oo+pp')" --split
   1 changesets pruned
   1 new orphan changesets
   $ hg log -G